defense secretary leon panetta issues a chilling warning about computer hackers. a scenario he describes as a possible cyber pearl harbor that could be as destructive as the 9/11 attacks. we're live at the pentagon. >>> and hello, brooklyn. the legendary barbra streisand takes the stage in her hometown for the very first time. ♪ beneath the moon, the stars and under the sun ♪ >> a homecoming concert decades in the making today, friday, october 12th, 2012. >>> from nbc news, this is a special edition of "today," decision 2012, with matt lauer and savannah guthrie. live from studio 1a in rockefeller plaza. >>> and good morning. welcome to "today" on a friday morning. i'm matt lawer. >> good morning, everyone. i'm savannah guthrie. what a night. where were you doing the debate? >> right there in the second row of the yankee game in the bronx. i went to see the yankee game, but i tivoed this and watched it this morning. it was different. >> well, in your event there was a clear cut winner and loser. in this debate, unclear. it was definitely the only chance for a